docs: Add docs for CostTrigger

[robinholzi]

Motivation

Lays out the architecture and core functionality of our new cost triggers

Also updating all other triggering docs along the way alongside some renamings to establish consistent naming

[github-actions]

^{( % to main)
( % to main)}

[MaxiBoether]

should I also review this already?

[codecov]

Codecov Report

Attention: Patch coverage is 92.30769% with 1 line in your changes missing coverage. Please review.

Project coverage is 85.82%. Comparing base (cbd1006) to head (0e04f5e).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
...l/triggers/dataincorporationlatency_costtrigger.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #600   +/-   ##
=======================================
  Coverage   85.82%   85.82%           
=======================================
  Files         257      257           
  Lines       11168    11168           
=======================================
  Hits         9585     9585           
  Misses       1583     1583           

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[robinholzi]

@MaxiBoether Should be ready, but it isn't time-critical.

[MaxiBoether]

Thank you. Mostly looks good, I had few short comments

[MaxiBoether]

LGTM!